Switch



R. DUNN SWITCH April 7, 1931.

Filed y 15, 1929 2 Sheets-Sheet 1 .fr I I v A April 7, 1931. R DUN1,800,137

SWITCVH Filed July 15, 1929 2 Sheets-Sheet 2 Patented Apr. 7, 1931 i I vUNITED STATES PATENT OFFICE RUFUS DUNN, OI WINCHESTER, KENTUCKY SWITCHApplication filed July 15, 1929.- Serlal No. 878,478.

This invention relates to an electric switch Figure 6 is a perspectiveview of one of the adapted to be used with a door, the general springterminal members. object of the invention being to provide a ro- Figure7 is a view of the spring for the tary member having four projectionsthereon rotary membe arrangedaquarter turn from each other, with Figure8 is a perspective view of the trip 51;

a pair of bridging strips on the member and its supporting bracket.through which a pair of pins, the members of In these views, the numeral1 indicates a which are diametrically opposite each other, base ofnonconducting material and 2 indipass, whereby when an arm is engaged bya cates a casing suitably attached to the'base trip on a door which isbeing opened, the roand having an opening 3 in its lower front 60 tarymember will be moved a quarter turn to part. A rotary member 4, ofcylindrical place one of the contact strips in a position to shape, isrotatably supported in the casing bridge two members of a circuit so asto close by the brackets 5 which are fastened to the the circuit, thetrip being so constructed that base, and this member 4 is also formed ofthe door can be closed without operating the non-conducting material.The rotary mem- 66 member and then when the door is again ber carriesfour pins 6 which are arranged a opened, the member will be movedanother quarter turn from each other and it also quarter turn so as tobreak the circuit. Thus carries a pair of bridging strips 7 and 7' byopening the door the first time, the circuit which are diametr callyopposite each other is completed andwhen the door is opened the nd areembedded 1n the member, and two of 7 second time, the circuit is broken.The inthe pins pass through these. bridging memvention is useful forcontrollingthe circuit h r he pms Wlll pass through the openof a lamp ina cellar where a person entering g 3 g' h rotary movement 0 the thecellar will open the door and close the member- I circuit of the lamp,after which the door is ar Wheel 8 1s attached to one of the closed.Then when the person leaves the .g 9 the rotary member. and g g cellar,as he opens the door the second time, y a pring 9 attached to the base,this springl th i it i b k and star wheel acting to frictionally hol IThis invention also consists in certain other the rotary member againstmovement and features of construction and in the combinaalso flctmgfimsh the movement of the so tion and arrangement of the several parts,to m raft r It has beenin1tial1y move s be hereinafter fully described,illustrated in that the member will always cometo rest the accompanyingdrawings and specifically with two of the pins in a vertical positionpointed out in the appended claim. 1 and the other two in a horizontalposition.

In describing the invention in detail, ref- A vpair of spring contacts10 is fastened to erence will be had t t aoc mpa ymg the base, withtheir free ends rounded, as ings wherein like characters denote hke orShown t 11 d engaging th rotary i 9 P g Rafts 01 g Several ber. Thesecontacts are connected by the Y h 1 conductors 12 which form portion'ofa cirgh 1 1s anew P y In Sectlon, sjhowlngv cuit for a lamp or the like.As will be seen, the switch member apfilied to the casing of a. theparts are so arranged that When the door and the tn on t 9 door rotarymember is moved to a position with J2 5:3 3; g ai 33; with part of theone of the bridging members uppermost,

a said bridging member will engage the 5 g g fii i ig igf ggg ig f mrounded parts 11 of the contactslO and thus P Figure 4 is a top planView of the switc complete the circuit, but when the bridging devicewith the casing in Section members are in a horizontal plane, the conhth tacts 10 e a e the insulated of the gg g gg l m Sectlont rough erotary mem i and thus the circuitisbroken. I00

- ber, pins carried by the cylindrical member,

A bracket 13 is fastened to the door 14, member for imparting rotarymovement to the base 1 being fastened to the frame 15, the cylindricalmember when the movable and this bracket carries a pivoted trip 16member is moved in one direction.

which is so arranged that when the door is opened, it will engage thedepending pin 6, thus rotating the member 4 a quarter turn. When thedoor is closed, the trip will simply pivot on the bracket and not turnthe member 4. The parts should be so arranged that when the door isfirst opened and the rotary member turned a quarter turn, one of thebridging strips will be brought in engagement with the contacts 10 andthus close the circuit. Then, as before stated,

the door can be closed without breaking the circuit. When the dooris'opened a second time, the rotary member will be turned to a positionwhere the bridging strip is moved out of engagement with the contacts 10and the circuit is broken. Thus upon the first opening of the door, thecircuit is'closed and when the door is opened a second time, the circuitis broken. As before stated, this device is useful on a cellar door andpermits a person to close the circuit of a lamp in the cellar when hefirst opens the door and then when he leaves the cellar and opens thedoor a second time, he will close the circuit so that there is no dangerof one forgetting to open thecircuit of a lamp in the cellar when heleaves the same. Ofcourse, the invention can be used for other purposes.

Besides being useful forcontrolling the circuit of a lamp in a cellar,the invention can be also used for controlling the'circuit of a lamp in.a bathroom, toilet or any other place where such invention would beuseful.

It is thought from the foregoing description that the advantages andnovel features of the invention will be" readily apparent.

It is to be understood that changes may be made in the construction andin the combina- ,tion and arrangement of the several parts,

rically opposite points thereon, pins passing through the strips intothe cylindrical memand arranged a quarter turn from the other pins, acircuit, including a pair of contact members, connected with the baseand engaging the cylindrical member whereby said contacts will bebridged by the conductor strips during the rotation of the cylindricalmemberand atrip parton the movable member for engaging the pins on thecylindrical I afix my signature. RUFUS DUNN.

